Skip to main content


OR 18 Spur: South Yamhill River Bridge Replacement

Construction Phase

Region 2: Willamette Valley and Northwest Oregon (McMinnville, Yamhill County)

​​​​​​​​​​​​​​​​​​​​This project will replace the South Yamhill River Bridge located on the OR 18 spur section at milepost 46.66. ​

Construction banner


Traffic Impact

Online Open House

Expect delays and intermittent lane closures controlled by flaggers​ for material and equipment delivery. 

Construction Impacts

On OR 18 & Three Mile Lane: 
  • Daily, Monday through Thursday, between 9 a.m. and 4 p.m.
  • Friday, between 9 a.m. and 3 p.m.
  • Nightly Sunday night through Friday morning, between 8 p.m. and 6 a.m.
On side streets:
  • Daily, Monday through Thursday, between 9 a.m. and 4 p.m.
  • Friday, between 9 a.m. and 3 p.m.
  • Nightly, Sunday night through Friday morning, between 6 p.m. and 7 a.m.

​There will be construction noise and short delays as trucks enter and leave the work zone.

​For the most up to date information, visit TripCheck.

Meetings and Events

Find out what road work is being done in 2022!

Visit our construction online open house to learn about the projects and the impacts to traffic that may occur as we work to build, repair and improve the roads that connect the communities of Region 2.

Sign up to receive future information about projects, road closures or invites to events. You can browse the different topics and sign up for the ones that interest you!



​​Enlarged project mapThe South Yamhill River Bridge was built in 1951 and is approaching the end of its functional lifespan with many components that are in poor condition. 

This project will replace the South Yamhill River Bridge on a busy route into and out of McMinnville with a daily average daily traffic volume of 16,000 vehicles. ​​The new bridge will replace the existing 35 foot wide bridge with a wider 48 foot wide bridge. This will better accommodate large trucks, bicycles and pedestrians. 

For construction staging, a detour bridge will be placed to the west of the existing bridge. Traffic will be detoured while the existing bridge is removed and the new one is constructed in the same location.


Design through 2021.
Construction to begin in 2021 and estimated to last four years.


  • We will build a temporary diversion bridge to the west of the existing bridge. 


  • We will build the connections from the road to the temporary diversion bridge. Our crews will mostly be working off of the existing roadway. 
  • After we build the connections, we will route traffic and pedestrians to the diversion bridge, remove the existing bridge and construct the new bridge. 


  • We will complete the construction of the new bridge and rebuild connections to the roadway.
  • We will construct a sanitary sewer line along Three Mile Lane.
    • During this time expect delays and road closures to a single lane of traffic controlled by flaggers. 


OR 18 | ​South Yamhill River Bridge in McMinnville

Cost and Funding

​The project will cost an estimated $38 million.

Contacts & Media

Project map

Project Contact

Assistant Resident Engineer
Leia Kagawa

Get Project Alerts

Sign up for the newsletter!

Last Updated

7/12/2022 8:54 PM

Project Number